TaxAct Professional Edition allows you to lock returns after e-filing, to prevent changes to the filed returns.

To automatically lock returns after e-filing (or to deselect this option):

1. From within your TaxAct Professional Edition program, click Preparer in the upper menu bar, hover your mouse over Master Information, then click General.
2. In the Filing/Printing Options section, click the Checkbox next to Automatically lock returns after E-Filing to check or uncheck the box.
3. Click X in the top right of the window to close.

To unlock a return:

1. From within your TaxAct Professional Edition program, click Clients to view the Client Manager screen (if it is not already visible).
2. Right-click the client you want to unlock.
3. Click Unlock Return(s).